I have two 4 gallon roto packs fuel tanks with a front runner roof rack mounting plate. The tanks do include the Ai13 spouts so you don't have to worry about the silly eco spout from RotoPax. The mounts are just a simple standard deluxe type from rotopax including the extensions. You'll notice a little bit of sunfade damage on the deluxe mounts but it will not affect the performance. These two tanks suited me very well for my off-road trips and now I've gone to something else. It's time for these to go to a new home where they can be used. Brand new everything cost me $550 not including shipping or tax. These are in good shape and will include everything you need to mount this on a Frontrunner Roof Rack or similar. 

Asking $450 and will consider reasonable offers.

Located in Elizabeth Colorado. I am willing to meet part way in the Denver area and Colorado Springs area.